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MB Quart OWC304

175W 12" Onyx Series Dual 4 ohm Subwoofer

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List price $109.99

$29.95

with warranty

You Save: $80.04 (72.77%)

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Bundled Savings with this Product

Save 10% on a Trunk/Cabin Sound Damping Kit!

Get rid of the rattles and improve your ride! Save 10% on the Maxxlink VSD-TK Trunk Sound Damping Kit when you purchase select Maxxsonics products from Hifonics, MB Quart, Autotek, and Crunch. Limited time only!

7.00

67862

616

MB Quart OWC304

$29.95

+

10% OFF

Maxxlink VSD-TK

$69.99

Special Price $62.99 ($69.99 if purchased separately)

Maxxlink VSD-TK

• Eliminates Road Noise
• Reduces Rattles
• Heat Insulation
• Five 18" x 32" Sections
• Butyl-Based Material

10% Off on the Subwoofer Box!

Save 10% off a 12" sealed subwoofer enclosure with your purchase!

3.50

67862

503

MB Quart OWC304

$29.95

+

10% OFF

Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

$34.99

Special Price $31.49 ($34.99 if purchased separately)

Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

• 3/4" Medium Density Fiberboard Construction
• Durable Black Carpeting
• Pre-Lined with Poly-Fil
• Gold Speaker Terminals

(Offer 1 of 2)

Combined Total Price

$92.94

You Save $7.00

General Features:

  • 12" Dual 4 Ohm Onyx Series Subwoofer
  • Power Handling:
    • Peak: 350 watts
    • RMS: 175 watts
  • Impedance: 4 ohms
  • Injection molded polypropylene cone
  • UV Resistant butyl rubber surround
  • Deep drawn heavy gauge stamped steel basket
  • Heavy duty textured powder coat finish
  • Red treated Nomex spiders
  • Push & Insert Style speaker terminals
  • Anti-resonant magnet cover
  • 1.5" High temperature aluminum voice coil
  • Heat-dispersing vented pole plate
  • Frequency response: 35-250 Hz
  • Resonance Frequency (Fs): 30 Hz
  • Sensitivity: 84.6 dB
  • Top-mount depth: 6-1/16"
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Product History:

MB Quart OWC304 thumbnail
(newest, current model)
MB Quart ONX304 thumbnail
(previous model, replaced by MB Quart OWC304)

Subwoofer Specifications

Subwoofer Series
Each subwoofer manufactured is part of a series. This is the name of the subwoofer's series.
ONYX (MB Quart)
Subwoofer Size
Refers to the diameter of the subwoofer, measured in inches.
12"
Peak Power Handling
Peak power handling refers to the amount of power a speaker can handle during a brief musical burst. The RMS power range figure is a much more reliable rating for determining the speaker's power requirements. The Peak power handling specification is typically rated per speaker unless otherwise noted.
350 watts
RMS Power Handling
The RMS power is the amount of power the speaker requires to operate safely and properly. RMS Power Handling refers to the amount of power a speaker can handle on a continuous basis. We recommend powering your speakers or subwoofer with 80%-120% of its recommended RMS rating. The RMS power handling specification is typically rated per speaker unless otherwise noted.
175 watts
Voice Coil(s)
Dual voice coil subs have more wiring flexibility than single voice coils subs; however, single voice coil subwoofers provide easier hookup options for wiring multiple subwoofers in parallel or series. You may also run a dual voice coil (DVC) sub in parallel, series, or combination. A quad voice coil has four voice coils and is equal to two dual voice coil subwoofers as far as wiring goes.
Dual
Impedance (Per Voice Coil)
The load value (in ohms) that the speakers present to the amplifier per voice coil - the amount of resistance to the current flow. This is a key specification as subs wired in parallel or low impedances can create problems with your amplifier and potentially void all warranties. We encourage you to ask our support department prior to purchase if you do not understand which impedance level will suit your application best.
4 ohms
Voice Coil Diameter
Diameter of voice coil, usually measured in inches.
1.5"
Subwoofer Design
This is the design of the subwoofer or the opening of the subwoofer enclosure. Each design has it's own benefits, whether it is a square, circle, or oval.

Round/Circle: This is the typical and common subwoofer design. They have a round cone and are a circle in design.

Square: These woofers are able to achieve a greater cone area in a smaller space. Because of the greater surface area, some square subwoofers will be louder than a round subwoofer of the same size.

Round / Circle
Main Cone Color
This is the color of the speaker's or subwoofer's cone.
Black
Woofer Composition
Lightweight woofer cone materials are essential for efficient operation. Poly cones produce exceptional sound and are sturdy against various changes in temperature. Paper cones are very efficient, and when treated for moisture resistance, will perform at a high level. Poly refers to polypropylene, which is thermoplastic or fibers that are polymers of propylene. IMPP refers to injection molded polypropylene, a commonly used process and material in speakers.
Injection Molded Polypropylene (IMPP)
Woofer Surround
A speakers surround is part of the suspension system. The surround protects the cone and prevents it from being displaced as it flexes out from the basket. It is usually made of a durable material like treated foam or rubber in order to withstand the strenuous job of producing bass frequencies.
Butyl Rubber
Subwoofer Grille
Most subwoofers are able to accommodate a universal grille; however, some subs include a grille and others have a specific, optional grille available for purchase separately. If "yes", then the subwoofer includes a grille. If "optional (sold separately)" the matching grille will need to be purchased in addition to the sub.
No
Re-Cone Kit Available
Some higher end subwoofers have replaceable cone assemblies. In case of a blown woofer, a recone kit allows for a simple replacement, as opposed to purchasing an entire new subwoofer.
No

Recommended Enclosure Specifications

Recommended Enclosure Type
This is the recommended type of enclosure that the subwoofer should be installed into. Some subwoofers are specially designed for particular enclosures.

Sealed: These enclosures completely enclose the air inside the box. These boxes produce a tight bass.

Ported/Vented: These enclosures have a slot of air to escape from the box. The result is a sound that has more "boom".

Bandpass: These are a combination of both sealed and ported enclosures. They can be very efficient, but require tuning for the best response.

Ported / Vented
Sealed
Optimum Sealed Box Volume
This value indicates the ideal sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
1.25 cubic feet
Minimum Ported Box Volume
This value indicates the minimum ported box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
1.8 cubic feet
Optimum Ported Box Volume
This value indicates the ideal ported box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
2.5 cubic feet
Top-Mount Depth
The depth when installed on top of the mounting surface. Measured from the bottom of the speaker's magnet to the bottom of the mounting holes on the rim of the speaker.
5-1/4"
Cutout Diameter
The actual diameter of the hole you will need to cut out if you are creating a new mounting location for this speaker, or if you are mounting a subwoofer in a box.
10-3/4"
Shallow Mount Installation
This means that the subwoofer/speaker is designed to be installed in areas that do not have a lot of space. Shallow mount subwoofers are typically found under a seat or behind the seat in some trucks.

Shallow mount speakers will typically have a mounting depth of 2" or less, while shallow mount subwoofers will typically have a mounting depth of 3" or less.

No

Electromechanical Parameters

Equivalent Compliance (Vas)
This is the amount of air that has the same stiffness as the subwoofers suspension. The greater the rating, the lower the stiffness and larger recommended enclosure. It is measured in Liters.
99.286 liters
Total Speaker Q Value (Qts)
This is the subwoofers relative damping (Q) at the resonance frequency (Fs), including all dimensionless losses. Essentially, a high Qts value (closer to 1.0) means the subwoofer is great for sealed enclosures and a low Qts value (closer to 0) means the woofer is great in vented enclosures. A Qts of around 0.45 means the woofer will work decently in either enclosure type.
1.015
Electrical Q Value (Qes)
The subwoofers relative damping (Q) at the resonance frequency (Fs), including electrical losses. Also called the mechanical damping of the subwoofer. The unitless measurement usually varies from 0.5 10.
1.475
Electrical Resistance of Voice Coil (Re)
Amount of DC resistance of the subwoofer when measured with an ohm meter. Typically, this will read less than the impedance rating of the subwoofer.
8.16 ohms
Mechanical Q Value (Qms)
This is the subwoofers relative damping (Q) at the resonance frequency (Fs), including mechanical losses. Also called the mechanical damping of the subwoofer. This unitless measurement usually varies from 0.5 10.
255.83

Specials with this Item

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On Sale

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
80%
4 Star
0%
3 Star
20%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.8
Value
5.0
Features
5.0
Design
5.0
Usability
5.0

michael

Rancho Cucamonga, CA

Overall
Durability
Value
Features
Design
Usability

impressive

June 3, 2014

I didn't think that these would sound as good as they do. I have them in a 2.50 sealed box. it is very responsive

0 of 0 found this helpful

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nu fan

omaha ne

Overall
Durability
Value
Features
Design
Usability

great sq sub at great price

April 17, 2014

Didn't think it would sound as Google as it does. Sounds great and has low bass and best in 1.25 ft box Running a Boston 250w amp no problem.

0 of 0 found this helpful

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jimmyjames

Cookeville, TN

Overall
Durability
Value
Features
Design
Usability

great price and super clean sound

March 17, 2014

these subs sound very clean and are a great price, BUT they dont hit as "hard" as other subwoofers. if your looking for a good clean balanced sound then these are a great choice. but if your looking rattle your car apart these dont quite do it. they dont the really the deep bass that other 12s do.

0 of 0 found this helpful

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david

queen creek, AZ

Overall
Durability
Value
Features
Design
Usability

Thing pounds!!!

January 27, 2014

Mb Quart makes some quality sound I love the way this sub sounds and looks. If your looking for clean bass for a reasonable price look no further. Sonic is the best!

0 of 0 found this helpful

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Claire

Sandy, UT

Overall
Durability
Value
Features
Design
Usability

Awesome Sub

January 6, 2014

These pack a hell of a punch when you blast them. These match up with my system perfectly. For how much it costs, I can't complain. My friends think I spent over 500 bucks doing up the sub but I spent a lot less. Pair this up with a sufficient class D or cheap class A/B amp and you're good to go.

0 of 0 found this helpful

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Accessory Tools and Products

Accessories added

Single 12" Subwoofer Angled Truck or Hatchback Box Enclosure

CARB Compliant, 5/8" MDF Shallow Sub Enclosure Lined with Polyfil.

Your Price $34.99

Single 12" Ported Enclosure Custom Black Baffle

Gold Binding post terminals and a high quality 5/8" MDF construction.

Your Price $59.99

25 ft. of Streetwires 12 Gauge Speaker Cable

You'll need speaker wire to hook up that new subwoofer!

Your Price $44.95

Belva 23 ft. of 12 Gauge Speaker Wire

Ultra-flexible PVC blended jacket for easy installation.

Your Price $14.99

20 Square Feet of Sound Dampening Material

NVX Sound dampening is thicker than competitors, eliminates rattles and gives you bigger bass!

Your Price $59.99

Dynamat Sound Dampening Trunk Kit

Did you know sound dampening will reduce those annoying rattles and even increase your SPL?

Your Price $109.95

Stinger Sound Dampening Trunk Kit

Stinger's Roadkill sound dampening series is sure to kill unwanted road noise and rattles! Enough sound dampening for your whole trunk!

Your Price $69.99

20 oz. Bag of Poly-Fil

Polyester fiber fiberfill adds better bass to your system.

Your Price $5.99

12 oz. Can of Adhesive Spray

Spray adhesive used for adhering carpet to subwoofer boxes without bubbles.

Your Price $6.99

Spring Post Terminal Cup

Makes adding a spring post terminal to an enclosure simple! Banana clip ready!

Your Price $3.99

Gold Plated Dual Terminal Banana Plug Connector

Enables an expandable, secure connection accepting up to 8 gauge wire.

Your Price $3.99

Car Stereo and Speaker Installation Tool Kit

Includes Test Light, Crimp/Splice Tool, Multi-bit Screwdriver and more.

Your Price $12.99

Cordless Multi-Functional Heat Tool Soldering Iron Kit

Continuous working lock allows you to work without holding down trigger.

Your Price $79.99

4 Ft of 1/4" Thick Black Heat Shrink Tubing

Provides abrasion resistance and added protection for your cables.

Your Price $3.99

2" Universal, Professional Heavy Duty Roller for Sound Damping/Dampening

Universal rubber roller to make it easy to install sound dampening.

Your Price $7.99

1mm All Purpose Solder

Solder is all purpose for use on most projects where solder is needed.

Your Price $8.99

12" Protective Waffle Subwoofer Grille

Keep your subwoofer looking amazing while keeping it safe.

Your Price $4.99

Scosche SPL Meter

Monitor the noise level of your new car audio system with this SPL meter measuring from 60-135 dB.

Your Price $21.99

AutoSound 2000 CD-101

Low frequency test CD

Your Price $11.99

Impedance Meter / Signal Generator

Easy to locate tuning frequencies of passive radiators and ported enclosures

Your Price $299.99

1 MB Quart OWC304 Subwoofer

Mono Amp

2 Channel Amp - Bridged

2 MB Quart OWC304 Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp - Bridged

3 MB Quart OWC304 Subwoofers

Mono Amp

4 Channel Amp

4 MB Quart OWC304 Subwoofers

Mono Amp

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp

Browse 2 questions and 7 answers
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
good reviews and cheap but still sounds good
Jacob M on Aug 14, 2014
the excellent price, along with sonic electronix support.
Charles B on Aug 1, 2014
will a 1.5 cubic feet per sub slot ported box sound good with these owc 304's?
A shopper on Aug 2, 2014
Best Answer: It should be ok. According to the thiele small parameters it would be better in a sealed enclosure. I am still building mine but it has a lot of compound angles. I am doing 2 in a 5.1 cu ft sealed enclosure.
Reply · Report · Mike M on Aug 2, 2014
· Add Answer · I Have This Question Too (0)

Product Summary

Manufacturer

Model Number

OWC304

UPC

806576220732

Weight

7.30lbs

Internal SKU

owc304

Internal Product ID

67862

Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: MB Quart OWC304

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